JP2000335596A - Self-supporting type bag-shaped container having enhanced self-supporting properties - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-supporting type bag-shaped container provided with the self-supporting properties when a content is reduced, which is not provided for self-supporting type bag-shaped containers heretofore available, while keeping the merits of the self-supporting type bag-shaped containers heretofore available such as flexibility and high volume efficiency and further provided with the enhanced self-supporting properties. SOLUTION: A self-supporting type bag-shaped container 1 with an injection outlet is provided with its bottom to be expanded by filling a content therein and enable the container to be self-supported, and a reinforcing means 6 is provided on a part or the whole of one side, which is extended in the vertical direction when being self-supported, out of two welded sides on which two sheets are welded for the purpose of forming the container 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-contained bag-like container filled with liquid or the like, and more particularly to a large-capacity self-contained bag-like container which is highly self-supporting and hard to fall down.

[0002]

2. Description of the Related Art Along with an increase in awareness of environmental protection, bag-shaped containers have been used as refillable containers, especially for household detergents, in order to escape from disposable containers. I have. Most of the bag-like containers used for this purpose are stand-up pouches or gusset bags, because they are easily displayed at stores.

However, these are not suitable as large-capacity containers because they are easily deformed in bag-like containers.

[0004] Thus, large-capacity containers include PET bottles, bag-in-boxes, and plastic tanks.

[0005] These bag-like containers, plastic bottles, bag-in-boxes, plastic tanks, and the like have become typical examples of soft and hard resin containers at present. A soft container represented by a bag-shaped container is characterized in that the volume of the container itself decreases with a decrease in the contents,
On the other hand, rigid containers represented by PET bottles and plastic tanks have a high stationary property as containers and are suitably used as large-capacity containers, and because they are pressure containers depending on their shape, they are also used as containers for carbonated beverages and the like. The feature is to get.

[0006]

However, the above-mentioned conventional container has the following problems.

[0007] First, the gusset bag container has a lower portion formed in a box shape, but has low rigidity due to the configuration of flexible sides and surfaces, and the contents are biased downward as shown in FIG. There is a problem that the container rolls because it has a shape like a daruma and the lower part approaches a sphere, in other words, there is a problem that sitting is poor.

[0008] A so-called bag-in-box in which a bag-like container is housed in a box has made it possible to transport a large volume while solving such problems. This is a case where a large bag is folded. Because it was stored in the room, the discharge residue was generated.

In addition, the outer box is usually made of corrugated cardboard, which is troublesome to open or replace the discharge port (valve), and has the drawback of being difficult to hold.

On the other hand, for rigid containers such as PET bottles and plastic tanks, containers having an internal capacity of more than 3 liters have also been manufactured, taking advantage of the fact that the containers are not easily deformed. There was difficulty in handling.

Further, these large-capacity containers are inevitably large in size, and have become a very serious problem in terms of waste disposal.

Accordingly, the present invention is not only capable of maintaining the advantages of the conventional free-standing bag-shaped container of flexibility and high volumetric efficiency, but also having the self-sustainability at the time of reducing the content, which has not been provided by the conventional free-standing bag-shaped container. It is still another object of the present invention to provide a self-supporting bag-like container having improved self-sustainability.

[0013]

That is, the self-standing bag-like container of the present invention, which has improved self-sustainability, has a spout and is filled with contents so that the bottom part is expanded and becomes self-standing. The present invention is characterized in that a part or the whole of a side that extends in a vertical direction when the sheet is self-supported is reinforced among welded sides where two sheets are welded to form a container.

The self-standing bag-type container of the present invention with improved self-sustainability is a self-standing bag-shaped container having a spout and having a box-shaped bottom portion by filling the contents to be self-standing. The method is characterized in that, of the welded sides where the two sheets are welded to form, a part or all of the sides extending in the vertical direction when the sheets are made independent are reinforced.

Further, the present invention has one of the following features. (1) The self-supporting bag-like container according to any one of claims 1 and 2, wherein the reinforcing means has a core material sandwiched between two sheets. (2) The self-supporting bag-like container according to any one of (1) and (2), wherein the reinforcing means is formed by covering and fixing the welding means to the welding portion. (3) The self-standing bag-like container according to any one of (1) and (2), wherein the reinforcing means has a welded portion formed in a gutter shape. (4) The self-supporting bag-like container according to any one of claims 1 and 2, wherein the reinforcing means is obtained by further folding the welded portion. (5) The reinforcing means is detachably fixed to the welded portion. Furthermore, the self-standing bag-shaped container having improved self-sustainability of the present invention is characterized in that the spout and the container body are joined via a joining member using a heat-shrinkable material, and that the spout member is joined to the container body. A welding portion is provided at a shoulder portion of the container body so as to spread downward from a lower end position.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a self-standing bag-like container 1 showing a first embodiment of the present invention.

As shown in the figure, a spout 4 is provided at an upper end 3 of a so-called gusset bag container main body (hereinafter, referred to as a container main body) 2 formed of a soft sheet by a conventional method, and a hanging handle 5 is further provided. Is a self-supporting bag-shaped container provided with.
The vertical portions (A, B, C, D) of the welded portion are provided with reinforcing means 6 for reinforcing the vertical portions (A, B, C, D).

The container body 2 is formed as follows.

First, as shown in FIG. 2, a flexible sheet 7 serving as a material is used.
Is folded into a tube. Then, as shown in FIG. 3, desired widths of the bent portions B, C, and D at the four corners including the butted portion A are welded by the sealer 8. Further, one end (lower end) 9
Are welded to form the container bottom, and the container body 2 is formed.
6 is a reinforcing means.

The container body 2 is formed of the following composite sheet. As the material of the composite sheet, plastic sheet,
It can be selected from a metal sheet or a composite sheet using these as a constituent material. Examples of plastic sheets include polyethylene, polypropylene, polyester,
Polycarbonate, nylon resin and the like are preferably used.

In FIG. 2, the container body 2 is formed by folding one material sheet 7, but it may be formed by welding a plurality of sheets constituting each side.

The spout 4 is attached to the container body 2. These are not directly joined as shown in FIG. 4 but are joined via a joint tube 10.
A screw cap 11 is provided at the tip of the spout 4.

After the container main body 2 is formed in a bag shape by leaving only the opening at the upper end 3 in advance by the above method, as shown in FIG.
A two-layer resin tube 13 made of a non-heat-weldable material 14 on the inside and a heat-weldable material 15 on the outside is protruded from the lower end of the heat-shrinkable tube 12 by a desired amount. The joint tube 10 is formed by welding in a state (position) where the joint tube 10 is formed.

Next, the joint tube 10 and the container body 2 are welded. At this time, the resin tube 13 below the joint tube 10 is inserted into the upper end opening 3 of the container body 2, and the container body 2, the heat-shrinkable tube 12 of the joint tube 10 (part F in FIG. 6A), and the container body 2 and the resin tube 13 of the joint tube 10 (FIG. 6A)
G part) are separately welded. And then
The shoulder 16 is welded downwardly from the lower end position J of the resin tube 13 so as to draw an eight-shape (H).

The spout 4 is connected to the joint tube 10.
Insert

The lower part of the spout 4 is a joint 17 with the container body 2, and the joint 17 has an appropriate number of grooves 18.
(Two in FIG. 4) are provided. When the joint tube 10 is heated, the heat-shrinkable tube 12 of the joint tube 10 shrinks, and the joint 17 of the spout 4 is tightened. The heat-shrinkable tube 12 contracted at this time is
And enters the groove 18 to prevent it from falling off. Therefore, the number of the groove 18 is appropriately large, and the deeper the groove, the higher the effect of retaining. Also, a ridge may be used instead of the groove.

At the time of insertion, the lower end 19 of the spout 4 and the lower end of the resin tube 13 (the lower end of the welded portion G) 20
It is important to prepare If the lower end 19 of the outlet 4
Is protruded from the lower end 20 of the resin tube 13, the periphery of the protruding portion becomes a dead space, which becomes an air pocket.

Therefore, by providing the welding portion H which spreads downward on the shoulder portion 16 as described above, the upper portion of the container body 2 is formed in the shape of an upper door toward the spout 4, so that an air reservoir is formed in the container. I am trying not to.

Since the joint tube 10 is formed of a thin-walled tube, the joint tube 10 tends to be flat when sandwiched, so that the joint tube 10 on which stress is concentrated.
A necessary and sufficient welding strength can be obtained at the welded portion (the arrow in FIG. 6 (b)) between the container and the container body 2.

[0031] In the conventional joining of a bag-like article and a tubular article, although it is in a state where sufficient joining strength has not been obtained, it is hardened to increase the strength, and stress is applied to the joining portion. Because of the concentration, the joint was easily broken.
The conventional structure does not have a container having a capacity of more than 500 cc because of such a problem. However, according to this joint structure, since the stress is easily dispersed, the joint can be prevented from being broken. . Also, the yield is dramatically improved in manufacturing.

In the case of using the self-supporting bag-shaped container constructed as described above, for example, when water is filled as the contents, the container main body bottom 9 is developed around the welded portion in the width of d in FIG. Form the bottom surface. In forming the container body 2, four pillars (FIGS. 1, A, B, C, and 4) that are first vertically welded when contents (liquid or the like) are put therein are vertically welded.
D) to form a box shape.

Therefore, it has been found that by reinforcing this column, the lower portion of the container body 2 can more easily maintain the box shape, and the stability is dramatically increased.

The reinforcing means 6 may be provided in advance when the container body 2 is formed, or may be provided after the spout 4 is provided.
It is important that the lower end is provided at a fixed distance (d) from the welded portion at the bottom end of the container body 2. That is, the lower end of the reinforcing means 6 is brought into contact with the floor when the contents are filled.

FIG. 7 shows a pattern example of the reinforcing means.

In the figure, (a) is a method in which the core material 21 is sandwiched between two sheets and welded at the time of the first welding, (b) is a method in which the core material 21 is fixed from the outside, and (c) is a method once A method in which two sheets are welded by a conventional method, and a separately formed reinforcing means 6 having a U-shaped cross section is fixed by a method such as bonding or welding. (D) is a gutter-like shape using a special sealer at the time of the first welding. (E) is a method in which the welded portion is folded back to bond or weld, and (F) is a method in which the reinforcing means 6 having a U-shaped cross section separately formed after welding is coated similarly to (C). The so-called return 22 which becomes a stopper on the inner surface of the means
Is provided and only plugged in. Can also be pulled out. Further, (g) shows reinforcing means 6 separately formed after welding.
Can be removed with a pinch. Although the snap 23 is used as the fixing means in the drawing, any method may be used as long as it is not easily detached by being pinched.

The reinforcing portion 6 may be provided in the entire area of the upright portion, but the effect is sufficient if the height is approximately half the height. The length may be changed according to the usage characteristics of the container.

With the above structure, when the contents are put in the container, the lower part of the container is prevented from deforming more than necessary as shown in the broken line in FIG. Greatly increases. Then, when the screw cap is removed and the contents are inclined to discharge the contents, the container body 2 is moderately deformed while supporting the box shape, so that the container body 2 is supported, so that the container body 2 is stable. In addition, the container body 2 can be used in accordance with the decrease in the contents.
Is deformed according to the amount of the contents, so that when the contents are discharged from the spout, there is no backflow of air unlike a container such as a normal bottle, so that the outflow is smooth and the conventional bag is used. As in the case of a container, the container does not sit down and the spout is not stabilized, so that a large-capacity container can be handled stably and easily.

FIG. 9 is a front view of a container showing a second embodiment of the present invention. This is an example applied to a so-called ordinary stand pouch. The applicant of the present invention has proposed a self-standing bag-like container in which the ribs 24 are formed first to improve the self-sustainability when the contents are reduced (Japanese Patent Application No. 9-147589).
This is another alternative. That is, since the welded portions on both sides are firmly erected by the reinforcing means 6, they serve to prevent the container body from being broken in the middle instead of the ribs.

[0040]

As described above, the self-standing bag-like container of the present invention is constructed as described above, so that when the contents are put into the container, the lower part of the container is prevented from being unnecessarily deformed into a spherical shape. The sense of stability increases in each step. In addition, since the shape of the container body changes in accordance with the amount of the contents according to the decrease in the contents, when the contents are discharged from the spout, there is no backflow of air unlike a container such as a normal bottle. The outflow is smooth, and the container does not have a poor seating and the spout is not stable unlike the conventional bag-shaped container. Even a large-capacity container can be stably and easily handled. It became so.

Further, when the container is emptied, the container body is folded compactly and is not bulky. Therefore, it became very simple in terms of waste disposal.

[Brief description of the drawings]

FIG. 1 is a perspective view of a self-standing bag-shaped container according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a container main body.

3A is a plan view and FIG. 3B is a perspective view showing a welded state of the container body.

FIG. 4 is a schematic perspective view showing the configuration of a self-standing bag-shaped container according to the present invention.

FIG. 5 is a schematic view showing a configuration of a joint tube.

6A is a cross-sectional view of a main part showing a joint state of a container body, a joint tube, and a spout, and FIG. 6B is a cross-sectional view of a main part showing a state of the joint.

FIGS. 7A to 7G are schematic views showing a reinforced state of a welded portion.

FIG. 8 is a side view showing a use state.

FIG. 9 is a front view showing another embodiment.

FIG. 10 is a schematic side view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Free-standing bag-shaped container 2 Container main body 3 Upper end 4 Outlet 5 Handle 6 Reinforcement means 7 Material sheet 8 Sealer 9 Bottom 10 Joint tube 11 Screw cap 12 Heat shrinkable tube 13 Resin tube 14 Non-heat-weldable material 15 Heat-weldable material Reference Signs List 16 shoulder portion 17 joint portion 18 groove 19 lower end of spout 20 lower end of welded portion 21 core material 22 return 23 snap 24 rib

Claims (9)

[Claims] 1. A self-supporting bag-like container having a spout and having a bottom portion that can be self-supported by being filled with contents so as to be self-supporting, a welding side where two sheets are welded to form a container. A self-supporting bag-like container in which the self-sustainability is enhanced by reinforcing part or all of the sides that extend in the vertical direction when self-standing. 2. A self-standing bag-like container having a spout and having a box-shaped bottom by filling contents, and being capable of standing free, a welding side where two sheets are welded to form a container. A self-supporting bag-like container in which the self-sustainability is enhanced by reinforcing part or all of the sides that extend in the vertical direction when self-standing. 3. The self-supporting self-supporting bag-like container according to claim 1, wherein the reinforcing means has a core material sandwiched between two sheets. 4. The self-supporting self-contained bag-like container according to claim 1, wherein the reinforcing means is formed by covering and fixing the reinforcing means to the welded portion. 5. The self-supporting bag-shaped container according to claim 1, wherein the reinforcing means has a welded portion formed in a gutter shape. 6. The self-standing bag-shaped container according to claim 1, wherein the reinforcing means is obtained by further folding the welded portion in two. 7. The self-supporting self-contained bag-like container according to claim 1, wherein the reinforcing means is such that the reinforcing means is detachably fixed to the welded portion. 8. The container according to claim 1, wherein the spout and the container body are joined via a joining member using a heat-shrinkable material.
8. The self-supporting bag-like container according to any one of claims 1 to 7, wherein the self-supporting property is enhanced. 9. The self-sustainability according to claim 8, wherein a welding portion is provided at a shoulder portion of the container body so as to spread downward from a lower end position of the spout member joined to the container body. Freestanding bag-shaped container.